Small RNA zippers lock miRNA molecules and block miRNA function in mammalian cells.

Abstract:

:MicroRNAs (miRNAs) loss-of-function phenotypes are mainly induced by chemically modified antisense oligonucleotides. Here we develop an alternative inhibitor for miRNAs, termed 'small RNA zipper'. It is designed to connect miRNA molecules end to end, forming a DNA-RNA duplex through a complementary interaction with high affinity, high specificity and high stability. Two miRNAs, miR-221 and miR-17, are tested in human breast cancer cell lines, demonstrating the 70∼90% knockdown of miRNA levels by 30-50 nM small RNA zippers. The miR-221 zipper shows capability in rescuing the expression of target genes of miR-221 and reversing the oncogenic function of miR-221 in breast cancer cells. In addition, we demonstrate that the miR-221 zipper attenuates doxorubicin resistance with higher efficiency than anti-miR-221 in human breast cancer cells. Taken together, small RNA zippers are a miRNA inhibitor, which can be used to induce miRNA loss-of-function phenotypes and validate miRNA target genes.

journal_name

Nat Commun

journal_title

Nature communications

authors

Meng L,Liu C,Lü J,Zhao Q,Deng S,Wang G,Qiao J,Zhang C,Zhen L,Lu Y,Li W,Zhang Y,Pestell RG,Fan H,Chen YH,Liu Z,Yu Z

doi

10.1038/ncomms13964

subject

Has Abstract

pub_date

2017-01-03 00:00:00

pages

13964

issn

2041-1723

pii

ncomms13964

journal_volume

8

pub_type

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